Preliminary Information
Temperature Compensating Gamma Trimster™ ATT3209
DESCRIPTION
FEATURES
The ATT3209 is
a
programmable gamma
reference that is designed to address gamma
correction in high-resolution LCD panels.
·
9 Programmable Buffered Gamma
Correction Outputs (VGMA0 – VGMA8)
- VGMA Output Range 0 to 14V
- VGMA Output Accuracy Better Than 1% of
AVDD Reference
- VGMA Output Drive > 100mA
Nonvolatile Storage of 32 Gamma
Reference Providing
The gamma voltage outputs are programmable
with their individual output values saved in a
nonvolatile analog storage cell. The storage
cells are arranged in a 9 x 32 array allowing
thirty-two gamma correction profiles to be
·
stored.
Depending upon the application
- Dynamic Gamma Correction and Gamma
Correction Based on Programmed
Temperature Profiles
2 Programmable Buffered VCOM Outputs
In System Programmability
requirements the ATT3209 is configured to
provide either two or three temperature
compensated Bank Select outputs that would be
used to drive the respective Bank Select inputs
of the AGT3209 Gamma Trimster.
·
·
·
Digital Programming Interface
In addition to the V
outputs there are two
GMA
APPLICATIONS
·
programmable
VCOM
outputs
providing
Yield Improvement through Gamma
Programming at Test
Simple Implementation of Dynamic Gamma
Compensation
independent multiple VCOM trim points to
minimize flicker on the LCD panel.
·
·
·
LCD Panel Color Calibration
Optimized Temperature Dependent Gamma
Correction
Typical Application
Proprietary and Confidential
Rev 2/7/2005